Western Australia's domestic gas market has a problem that is only getting harder to ignore. The Australian Energy Market Operator's 2025 Western Australia Gas Statement of Opportunities warns of a supply gap emerging from 2028, with shortfalls widening further from 2030 as consumption grows and existing field output declines. Against that backdrop, ASX-listed H3 Energy (ASX: H3E) says a new engineering review of its Warro gas field in the Perth Basin supports the case for commercially viable flow rates, provided completions are directed specifically at dry gas zones.
The company, which rebranded from Whitebark Energy in December 2025, holds a 100 per cent interest in the Warro Gas Project located approximately 200 kilometres north of Perth. Warro hosts an estimated 4.4 to 11.6 trillion cubic feet of gas and ranks as Western Australia's single largest onshore gas resource. It is also positioned just 30 kilometres from the Dampier-to-Bunbury Natural Gas Pipeline, a logistical advantage that could shorten the path to domestic market delivery considerably, according to the Sydney Morning Herald.
The engineering review, the latest in a series of technical reassessments, concludes that higher production rates are achievable if completions are designed to isolate dry gas intervals and avoid inadvertently stimulating adjacent water-bearing zones. That distinction matters enormously. Previous operators invested more than $100 million drilling four vertical wells and securing 3D seismic data, but after earlier fracturing, broad intervals were intersected that included both gas and mobile-water zones, and instead of gas surging to the surface, water choked flows back to disappointing levels of 1 to 2 million cubic feet a day.
An independent petrophysical review, conducted by global specialist Steve Adams, revealed that previous completion programmes targeted overly broad intervals, unintentionally stimulating water-bearing zones that likely suppressed gas flow. The study identified thick gas-bearing intervals with minimal mobile water in the Yarragadee Lower Formation, a high-quality reservoir unit now considered a prime target for re-completion and testing. With appraisal planning now formally under way, the company is moving from technical reassessment toward a concrete path for re-entry.
H3 Energy will focus on engineering solutions while RISC Advisory completes its commerciality study, which aims to quantify the economic flow rate required. The company believes that with modern interpretation, renewed regulatory support for fracture stimulation, and a targeted completion strategy, Warro can be transformed into a producing, high-value onshore gas asset.
CEO Nik Sykiotis has been consistent in his caution. The company is letting the technical work guide decision-making rather than rushing to drill, a posture that reflects how badly earlier campaigns were burned by incomplete reservoir understanding. Sykiotis has noted that the new interpretation is critical for improving understanding of the Warro reservoir and identifying areas where sustainable rates of dry gas could potentially flow, with water appearing to be located in one or two areas of the wellbore rather than throughout the reservoir.
The market context gives real urgency to this work. From 2028, a potential supply gap emerges in the WA domestic market with growth in consumption and decline in output from natural gas reserves, which is then partly mitigated in 2029 as new supply is anticipated to enter the market. The Step Change scenario forecast shows the WA domestic gas market supply projected to remain broadly balanced in the near term before supply gaps widen from 2030. WA's wholesale gas prices have more than doubled since 2020, making a breakthrough for a new long-term supply of gas imperative to help ease the squeeze on supply.
There are legitimate reasons for measured scepticism, however. The Warro field has been known since the late 1970s, and the history of ambitious reassessments followed by disappointing test results is long. Critics of expanded onshore gas development in WA also point to the state's renewable energy build-out, arguing that committing capital to tight gas projects with uncertain timelines could crowd out investment in storage and firming capacity that would serve the grid more flexibly. Climate advocates argue the 2028 supply gap should sharpen the focus on demand-side management and accelerated electrification rather than unlocking another fossil fuel resource. These are not unreasonable positions.
The more pragmatic reading, though, is that WA's industrial base, its mining operations, its gas-fired peaking generation, and its export commitments create gas demand that cannot be unwound on the timescale of the looming supply gap. The state operates under a domestic gas reservation policy requiring LNG exporters to set aside gas for local use, but additional supply sources remain in high demand. A field of Warro's scale, sitting on existing pipeline infrastructure, represents exactly the kind of brownfield opportunity that responsible energy planning should be assessing seriously.
Whether the engineering work ultimately delivers a development-ready appraisal programme will depend on RISC Advisory's commerciality findings and the results of any re-entry testing. H3 Energy is, at this stage, a small-cap explorer with a promising technical story, not a guaranteed supplier. Investors and policymakers alike would do well to watch the appraisal planning closely without treating it as a solved problem. For a state staring down a supply cliff from 2028, though, progress on Warro is welcome news. The AEMO Gas Statement of Opportunities makes clear that new domestic supply is not optional; the only open question is where it comes from and how quickly it can arrive.